Answers

1. (B)​Variation in a population results from an influx or development of new genetic material. Conjugation is a primitive form of sexual reproduction carried out by bacterial and algae. If a population is isolated, there can be no flow of genetic material.

2. (B)

Tendons connect bone to muscle; ligaments connect bone to bone.

3. (D)

A solution of pH 5 has H^+ concentration of 1 x 10^-5 M or -0.00001 M. A solution of ph7 has H^+ concentration of 1 x 10^-7 M or -0.0000001 M. You can see that 0.00001 M is 100 times more concentrated than 0.0000001 M.

4. (E)

Artificial selection is the selective breeding of domesticated plants and animals to develop desired traits.